Armature for reinforced concrete construction for the purpose of suspending



Aug. 15, 1916.

2 SHEETS-SHEET I E. G. HAHN. ARMATURE FoR nslwfoncfn CONCRETE coNsTRucnoN Fon THE PuRPosE oF susPENmNG wamHs THEREFRUM.

4 APPLICATION FILED APR. 2. |913- l l 94,622, Patented m n l l l l l u I E. G. HAHN.

ATTY WWTF@ TATES PATENT @FFT-@EO ERNST GOTTLOB HAHN, OF STUTTGART, GERMANY, ASSIGNOR. T0 OTTO HAHN AND WILLIAM HAHN, BOTH 0F ROCHESTER, NEW YORK.

ARMATURE FOR RENFORCED CONCRETE CONSTRUCTION FOR THE PURPOSE OF SUSPENDING- WEIGHTS THEREFROM.

Application led Apri12, 1913.

T0 all 'whom t may concern.'

Be it known that I, ERNST GoT'rLoB HAHN,

a subject of the King of i/Vurttemberg, re-

Suspending Weights Therefrom, of whichv the following is a specification.

In the construction of reinforced concrete now in use, there is as is well known, the' serious drawback that in contra-distinction to constructions of iron or wood, the suspension on the' reinforcedconcrete of weights of all kinds such as shafting, guide rods, of I, U or Z shaped iron for suspended tracks, cranes, runningblocks, tubular connections and so forth, can only be effected with difficulty and with considerable outlay of time, and much material which cannot be made fully available. As, moreover, in modern reinforced concrete constructions especially workshops, slaughter houses' and so forth, an exact disposition of the arrangement and the position of transmission shafts or other necessary suspensions in advance, is usually impossible, there have often occurred thereby serious subsequent delays in the building operations, or it was necessary in order that the necessary suspensions could be effected at a later time at any desired point of the building, to make provision everywhere for these special purposes, whereby, however, again a very considerable expenditure of fixing material and consequently a very considerable/addition to the expense of the building, was vincurred. Moreover, by the use of the fixing method hitherto employed, the appearance of the interior of the buildings was often very seriously disfigured.

rThe removal of these serious drawbacks is the object of the present invention and it 4is attained by the arrangement that a part of the usual iron rods ser-ving for the reinforcement of the concrete, is replaced by profile bars or supports of speciai profile, rolled out of fiuid iron, which according to position and form are so, arranged in the reinforced concrete construction, that a complete use of the same is possible. These bars have preferably haped prc-'iie and serve according to the 'the usual reinforcement Specification of Letters Patent.

Patented Aug. f5., ilitti.

Serial No. 758,326.

for the strengthening of the cement. They can be constructed with special reference to bending through the suspension and be provided with a correspondingly great portion of their section,devi'sed to resist the strain. 0n the ground of the special formation of these bars, there can at any desired point of the construction, even in 'the vaulting, be provided without any difiiculty, any desired kindof suspension, for which thereTsbnly `takes place, then these points in order to avoid any subsequent cutting out of the holes 1n the concrete, there are immediately inserted in the molds, corresponding wood blocks, which then serve at the same time for the undisplaceable fixing of the bar.

In the accompanying drawing, the improvement is illustrated in several constructions as follows Figures l and 2 show the construction applied to a reinforced concrete plate. Figs. 3 and i toan auxiliary support. Figs. 5 and 6 to a main support, and Figs. 7 and 8 in the neighborhood of a reinforced concrete pillar, while Fig. 9 is an enlarged v cross section.

in the reinforced concrete plates illustrated in Figs. l and 2, the reinforcing bars a which are formed essentially E.shaped are embedded in the concrete at suitable distances apart from one another either continuously throughout or in short straight pieces. Tn the auxiliary supports they are arranged as shown in Figs. 4 and 5, and in main supports, they may be arranged as shown in Figs. 5 and 6 at both sides of the profile of the support. This latter construction can obviously also be used for auxiliary supports and as illustrated in Figs. 3 and Li, also for main supports. in order toI secure to these bars suspensions of any kind, there is nothing further necessary in the finished reinforced concrete. constructions, than to expose somewhat the j's at the desired points by the formation oi -oies b in order for instance to secure the transmission bear ings c by means of hook screws d thereto. The lioies ai. not in this case be larger necessary a small exposure of the rod, whichvl as to breadth and depth than is just necessary for the insertion of the hook screws ci, whereupon these holes can afterward again be covered up, for instance, by fillin with plaster or the like, which is particulaily advisable if the possibility of rusting may take place at the exposed parts. An important advantage of this improvement includes moreover that these bars a can be employed without any alteration in the straight form and without clashing with one another, both for main and auxiliary supports without any alteration of the ordinary mold or shaping pattern, consequently in exactly the same manner as that of the ordinary reinforcement of round iron or? angle iron, whereby the further advantage is insured that a construction can be employed without extra costs or alterations and is always adaptable Vto any other than the originally planned purposes. The straight shape and the great periphery or surfacial area of these new armored rails insures, moreover, that the strains on the bearers are taken up almost entirely by these rods alone, so that the usual iron reinforcement can be utilized completely for the reinforcing of the strains.

Any pulling out or bending of the bars is obviated by the circumstance that these latter at their upper ends are provided with a horizontal flange e which can be arranged either one-sided as shown in Fig. 9 or twosided as shown in Figs. l() and 11. This flange e also forms a further supporting surface for the rod, which rod is held within the loop f just as in the ordinary reinforced construction which is equal to a further security against any bending or pulling out. In case it should accidentally happen in the arrangement of suspensions that one of the loops f should collide with a hook screw Z then the weak loop f will be simply bent a little to one side or if this is not possible, the hook screw can be formed one sided.

A further very important advantage of the present invention consists in the fact that the very widest play is given for any desired suspension, which moreover is of importance in the attachment of transmis- .sion bearings, in order that these bearings can slide conveniently in their position.

According to experience it is just in factory buildings that the transmission plays a very important part and that method of suspension is to be regarded as the most complete in which a displacement of the` bearing is possible for the purpose of its exact adjustment which in the present instance is provided for to the fullest extent.

As shown in Figs. 7 and 8, the fixing to pillars can be completely dispensed with because in this direction we can rely entirely upon the principal or auxiliary bearers and the constructor is in the position for instance to carry the transmission shafts as c', in connection with the bearings 0 illustrated in Figs. 7 and 8, to one side of or directly past the pillars which also secures the advantage that only short projecting bearings are further necessary and consequently a uniform pattern of journals can be made use of. As shown in Iig 9, the concrete b may be broken away to`VV receive the hook e and the opening filled with a body of plastic material b2, and to protect the outer sid'e of the hook c a layer of cement b3 may be added.

Patent claims.

1. The combination with a reinforced concrete construction, of a. metallic reinforcing and suspension member extending through and entirely embedded in the concrete and having a vertical portion having a horizontal flange and a horizontal portion of considerably greater thickness and provided near its edge spaced from the vertical portion with an upwardly extending flange, said reinforcing and suspending member being protected from fire and rust and adapted to be bared by breaking away portions of the concrete to uncover the horizontal portion for engagement of suspension members therewith, the bared portions of the reinforcing member and the suspension members being covered with concrete by plugging the recesses formerly out away.

2. In a device of the character described, the combination comprising a body of reinforced concrete, a flange member disposed in the concrete body which has broken out areas, suspension members disposed in the vbroken out areas, disposed in engagement with the flange member and a body of plastic matter disposed in the broken out area.

3. In a deviceA of the character described, the combinaiton comprising a body of reinforced concrete, a flange member disposed in the concrete body which has broken out areas, suspension members disposed in the broken out areas, disposed in engagement with the flange member and a body of plastic matter disposed in the broken out area and over the suspension members.

In testimony whereof I affix my signature in presence of two witnesses.

ERNST GOTTLOB HAH-N.

Witnesses:

RUDOLF WoLsERs, ERNEST NTENMANN. 

